From patchwork Wed Jan 15 22:53:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Anderson X-Patchwork-Id: 1223932 X-Patchwork-Delegate: uboot@andestech.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; helo=phobos.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20161025 header.b=cfFpcGno; dkim-atps=neutral Received: from phobos.denx.de (phobos.denx.de [IPv6:2a01:238:438b:c500:173d:9f52:ddab:ee01]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 47yjLK1qlXz9sR8 for ; Thu, 16 Jan 2020 09:54:01 +1100 (AEDT) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id 90BFD81840; Wed, 15 Jan 2020 23:53:56 +0100 (CET) Authentication-Results: phobos.denx.de; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Authentication-Results: phobos.denx.de; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="cfFpcGno"; dkim-atps=neutral Received: by phobos.denx.de (Postfix, from userid 109) id AB6BD818AB; Wed, 15 Jan 2020 23:53:54 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on phobos.denx.de X-Spam-Level: X-Spam-Status: No, score=-0.1 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FROM,SPF_HELO_NONE autolearn=ham autolearn_force=no version=3.4.2 Received: from mail-qv1-xf42.google.com (mail-qv1-xf42.google.com [IPv6:2607:f8b0:4864:20::f42]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits)) (No client certificate requested) by phobos.denx.de (Postfix) with ESMTPS id C2FC081840 for ; Wed, 15 Jan 2020 23:53:51 +0100 (CET) Authentication-Results: phobos.denx.de; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=seanga2@gmail.com Received: by mail-qv1-xf42.google.com with SMTP id o18so8212136qvf.1 for ; Wed, 15 Jan 2020 14:53:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:from:to:references:cc:autocrypt:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=xpcX8kG4d3XlFHat6Ct8cVqesqcMb/jPNvpmTd2n4oc=; b=cfFpcGnoYhs+3VCM9AdED8GiXXH2+vbTcOHXua4k9djegq92G1GXnjpD1VEbXxEvhA 4sUigtPC2KD+WKtAEyDOorPZE3uDutgYjSUVJeztDQq/4nYicwhINsV/LyXFFN6RMIbs ugoqUDQ4L4UeJphfFRqwKpzwnHMIHRDvj5RH9h+rOjSaCt/tEoiO/918T/x9nBFur8Bt TGKSnJdiWqOo4ROykMm7bVvKu4/dRZofERLjgILQ0gTLjNxNfAcyp29kuWZ6ec0PzGD6 nyW3n+Lcstp3vbN96Pr2yX+lsYbU1GiOFwIlwrdyn2hsCtKOjcH9XkG3SoPnJwdfEU0S DoRA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:from:to:references:cc:autocrypt :message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=xpcX8kG4d3XlFHat6Ct8cVqesqcMb/jPNvpmTd2n4oc=; b=mBa9iuq/IBXZTUYGewjhKvPzZE/bVQmq5bDe6h7L/qAR1XAxpAwZDhUFX1Oa5Zr2Rt QiDxD458xjZZf3F3oA9987cCWIfTDXEQ5ivt13P7uXrhzfcyga0ISPIHDuLE+XeXDVUf d3W5DUIIMIQtB+T0KIk5+USJO/xnXhzBD2vyZmdMMUPnN2pCq1aIAF+cM3trsjvUY9uy 06xgO8LxuIfK2aHUDkYPrunAP/mNLaDAJSl6Ge8AjdXMDiyt8Hm4SJeIBCccv9W4LGOM Wmi70I2w1WpdFec7C+d8eUGFreCrW0B5Ae5f+XPYolE3QPKl0WTHkL7DI3KaJ4r8dE2M Qorw== X-Gm-Message-State: APjAAAVnL4NIb+mUf+Ht1T6sEwm3AqCbjJ4uoQGRPiX/TFUFk6AI5XXW ou3qg3DOhdG22Rn+osR6PLKrkLZe5Z4= X-Google-Smtp-Source: APXvYqxvKr48D6D6GG4BFKC3SPL31p6nDl74cVCNKvw6FUApbP9aVhIFZcits4939euS/vGdysUy3g== X-Received: by 2002:ad4:51cc:: with SMTP id p12mr27973619qvq.113.1579128830568; Wed, 15 Jan 2020 14:53:50 -0800 (PST) Received: from [192.168.1.201] (pool-71-163-33-7.washdc.fios.verizon.net. [71.163.33.7]) by smtp.googlemail.com with ESMTPSA id q5sm9034815qkf.14.2020.01.15.14.53.49 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 15 Jan 2020 14:53:49 -0800 (PST) Subject: [PATCH v2 05/11] riscv: Add option to disable writes to mcounteren From: Sean Anderson To: U-Boot Mailing List References: <3411d84b-5a56-ae4e-1deb-085ef1a4971d@gmail.com> Autocrypt: addr=seanga2@gmail.com; prefer-encrypt=mutual; keydata= mQENBFe74PkBCACoLC5Zq2gwrDcCkr+EPGsT14bsxrW07GiYzQhLCgwnPdEpgU95pXltbFhw 46GfyffABWxHKO2x+3L1S6ZxC5AiKbYXo7lpnTBYjamPWYouz+VJEVjUx9aaSEByBah5kX6a lKFZWNbXLAJh+dE1HFaMi3TQXXaInaREc+aO1F7fCa2zNE75ja+6ah8L4TPRFZ2HKQzve0/Y GXtoRw97qmnm3U36vKWT/m2AiLF619F4T1mHvlfjyd9hrVwjH5h/2rFyroXVXBZHGA9Aj8eN F2si35dWSZlIwXkNu9bXp0/pIu6FD0bI+BEkD5S7aH1G1iAcMFi5Qq2RNa041DfQSDDHABEB AAG0K1NlYW4gR2FsbGFnaGVyIEFuZGVyc29uIDxzZWFuZ2EyQGdtYWlsLmNvbT6JAVcEEwEK AEECGwMFCwkIBwIGFQgJCgsCBBYCAwECHgECF4ACGQEWIQSQYR1bzo1I0gPoYCg+6I/stKEQ bgUCXT+S2AUJB2TlXwAKCRA+6I/stKEQbhNOB/9ooea0hU9Sgh7PBloU6CgaC5mlqPLB7NTp +JkB+nh3Fqhk+qLZwzEynnuDLl6ESpVHIc0Ym1lyF4gT3DsrlGT1h0Gzw7vUwd1+ZfN0CuIx Rn861U/dAUjvbtN5kMBqOI4/5ea+0r7MACcIVnKF/wMXBD8eypHsorT2sJTzwZ6DRCNP70C5 N1ahpqqNmXe0uLdP0pu55JCqhrGw2SinkRMdWyhSxT56uNwIVHGhLTqH7Q4t1N6G1EH626qa SvIJsWlNpll6Y3AYLDw2/Spw/hqieS2PQ/Ky3rPZnvJt7/aSNYsKoFGX0yjkH67Uq8Lx0k1L w8jpXnbEPQN3A2ZJCbeMuQENBF0/k2UBCADhvSlHblNc/aRAWtCFDblCJJMN/8Sd7S9u4ZRS w1wIB4tTF7caxc8yfCHa+FjMFeVu34QPtMOvd/gfHz0mr+t0PiTAdDSbd6o7tj+g5ylm+FhT OTUtJQ6mx6L9GzMmIDEbLxJMB9RfJaL2mT5JkujKxEst6nlHGV/lEQ54xBl5ImrPvuR5Dbnr zWQYlafb1IC5ZFwSMpBeSfhS7/kGPtFY3NkpLrii/CF+ME0DYYWxlkDIycqF3fsUGGfb3HIq z2l95OB45+mCs9DrIDZXRT6mFjLcl35UzuEErNIskCl9NKlbvAMAl+gbDH275SnE44ocC4qu 0tMe7Z5jpOy6J8nNABEBAAGJATwEGAEKACYWIQSQYR1bzo1I0gPoYCg+6I/stKEQbgUCXT+T ZQIbDAUJAeEzgAAKCRA+6I/stKEQbjAGB/4mYRqZTTEFmcS+f+8zsmjt2CfWvm38kR+sJFWB vz82pFiUWbUM5xvcuOQhz698WQnIazbDGSYaOipyVNS52YiuYJDqMszzgw++DrcSuu0oRYWN EWCkJjxMqjGg8uY0OZ6FJG+gYRN5wMFErGfV1OqQ7l00FYA9OzpOEuW9PzPZEutFnAbbh77i zvxbQtT7IJCL24A4KutNYKmWg98im4mCzQcJCxE86Bv69ErLVPUyYbp4doLadScilXlvkkjL iq1wOt3rRzOuw+qnWVgWGBPxdDftz0Wck941tYF9XE0aMgkf4o1sGoDZFUFPCQdfEYPzzV7O S5hN3/mP5UeooFHb Message-ID: <2eef694b-a166-3d62-bfab-a39e87cecf0a@gmail.com> Date: Wed, 15 Jan 2020 17:53:48 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.0 MIME-Version: 1.0 In-Reply-To: <3411d84b-5a56-ae4e-1deb-085ef1a4971d@gmail.com> Content-Language: en-US X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.26 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.101.4 at phobos.denx.de X-Virus-Status: Clean On the kendryte k210, writes to mcounteren result in an illegal instruction exception. Signed-off-by: Sean Anderson --- Changes for v2: Moved forward in the patch series arch/riscv/Kconfig | 3 +++ arch/riscv/cpu/cpu.c | 2 ++ 2 files changed, 5 insertions(+) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 9a7b0334c2..4f8c62dcff 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -226,6 +226,9 @@ config XIP from a NOR flash memory without copying the code to ram. Say yes here if U-Boot boots from flash directly. +config SYS_RISCV_NOCOUNTER + bool "Disable accesses to the mcounteren CSR" + config STACK_SIZE_SHIFT int default 14 diff --git a/arch/riscv/cpu/cpu.c b/arch/riscv/cpu/cpu.c index e457f6acbf..df9eae663c 100644 --- a/arch/riscv/cpu/cpu.c +++ b/arch/riscv/cpu/cpu.c @@ -89,7 +89,9 @@ int arch_cpu_init_dm(void) * Enable perf counters for cycle, time, * and instret counters only */ +#ifndef CONFIG_SYS_RISCV_NOCOUNTER csr_write(CSR_MCOUNTEREN, GENMASK(2, 0)); +#endif /* Disable paging */ if (supports_extension('s'))